<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no">
  <meta name="description" content="API docs for the getType property from the V2TIMMessageListGetOption class, for the Dart programming language.">
  <title>getType property - V2TIMMessageListGetOption class - v2_tim_message_list_get_option library - Dart API</title>


  
  <link rel="preconnect" href="https://fonts.gstatic.com">
  <link href="https://fonts.googleapis.com/css2?family=Roboto+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap" rel="stylesheet">
  <link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0" rel="stylesheet">
  
  <link rel="stylesheet" href="../../static-assets/github.css?v1">
  <link rel="stylesheet" href="../../static-assets/styles.css?v1">
  <link rel="icon" href="../../static-assets/favicon.png?v1">

  
</head>


<body data-base-href="../../" data-using-base-href="false" class="light-theme">

<div id="overlay-under-drawer"></div>

<header id="title">
  <span id="sidenav-left-toggle" class="material-symbols-outlined" role="button" tabindex="0">menu</span>
  <ol class="breadcrumbs gt-separated dark hidden-xs">
    <li><a href="../../index.html">tencent_cloud_chat_sdk</a></li>
    <li><a href="../../models_v2_tim_message_list_get_option/models_v2_tim_message_list_get_option-library.html">models&#47;v2_tim_message_list_get_option.dart</a></li>
    <li><a href="../../models_v2_tim_message_list_get_option/V2TIMMessageListGetOption-class.html">V2TIMMessageListGetOption</a></li>
    <li class="self-crumb">getType property</li>
  </ol>
  <div class="self-name">getType</div>
  <form class="search navbar-right" role="search">
    <input type="text" id="search-box" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search...">
  </form>
  <div class="toggle" id="theme-button" title="Toggle brightness">
    <label for="theme">
      <input type="checkbox" id="theme" value="light-theme">
      <span id="dark-theme-button" class="material-symbols-outlined">
        dark_mode
      </span>
      <span id="light-theme-button" class="material-symbols-outlined">
        light_mode
      </span>
    </label>
  </div>
</header>
<main>

<div
    id="dartdoc-main-content"
    class="main-content"
    data-above-sidebar="models_v2_tim_message_list_get_option&#47;V2TIMMessageListGetOption-class-sidebar.html"
    data-below-sidebar="">
    <div>
<h1><span class="kind-property">getType</span> property 
</h1></div>

      <section class="multi-line-signature">
        
        <a href="https://api.flutter.dev/flutter/dart-core/int-class.html">int</a>?
        <span class="name ">getType</span>
        <div class="features"><span class="feature">getter/setter pair</span></div>

      </section>
      
<section class="desc markdown">
  <p>拉取消息类型，可以设置拉取本地、云端更老或者更新的消息。</p>
<p>@note 请注意</p>
<p>当设置从云端拉取时，会将本地存储消息列表与云端存储消息列表合并后返回。如果无网络，则直接返回本地消息列表。
</p><p>关于 getType、拉取消息的起始消息、拉取消息的时间范围 的使用说明：
- getType 可以用来表示拉取的方向：往消息时间更老的方向 或者 往消息时间更新的方向；
- lastMsg/lastMsgSeq 用来表示拉取时的起点，第一次拉取时可以不填或者填 0；
- getTimeBegin/getTimePeriod 用来表示拉取消息的时间范围，时间范围的起止时间点与拉取方向(getType)有关；
- 当起始消息和时间范围都存在时，结果集可理解成：「单独按起始消息拉取的结果」与「单独按时间范围拉取的结果」 取交集；
- 当起始消息和时间范围都不存在时，结果集可理解成：从当前会话最新的一条消息开始，按照 getType 所指定的方向和拉取方式拉取。
</p><p>@param getType 拉取类型，取值为 V2TIM_GET_CLOUD_OLDER_MSG，V2TIM_GET_CLOUD_NEWER_MSG，V2TIM_GET_LOCAL_OLDER_MSG，V2TIM_GET_LOCAL_NEWER_MSG</p>
</section>

      
<section class="summary source-code" id="source">
  <h2><span>Implementation</span></h2>
  <pre class="language-dart"><code class="language-dart">int? getType;</code></pre>
</section>


</div> <!-- /.main-content -->

<div id="dartdoc-sidebar-left" class="sidebar sidebar-offcanvas-left">
  <!-- The search input and breadcrumbs below are only responsively visible at low resolutions. -->
<header id="header-search-sidebar" class="hidden-l">
  <form class="search-sidebar" role="search">
    <input type="text" id="search-sidebar" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search...">
  </form>
</header>

<ol class="breadcrumbs gt-separated dark hidden-l" id="sidebar-nav">
    <li><a href="../../index.html">tencent_cloud_chat_sdk</a></li>
    <li><a href="../../models_v2_tim_message_list_get_option/models_v2_tim_message_list_get_option-library.html">v2_tim_message_list_get_option</a></li>
    <li><a href="../../models_v2_tim_message_list_get_option/V2TIMMessageListGetOption-class.html">V2TIMMessageListGetOption</a></li>
    <li class="self-crumb">getType property</li>
</ol>


  <h5>V2TIMMessageListGetOption class</h5>
  <div id="dartdoc-sidebar-left-content"></div>
</div><!--/.sidebar-offcanvas-->

<div id="dartdoc-sidebar-right" class="sidebar sidebar-offcanvas-right">
</div><!--/.sidebar-offcanvas-->

</main>

<footer>
  <span class="no-break">
    tencent_cloud_chat_sdk
      8.5.6864-beta.7
  </span>

  
</footer>



<script src="../../static-assets/highlight.pack.js?v1"></script>
<script src="../../static-assets/docs.dart.js"></script>



</body>

</html>

